The importance of good posture is endorsed by vocal coaches TemperVox who state that poor posture can also be a major contributor to vocal strain. Sound is produced in the vocal tract and amplified in resonant areas of your body. Bad posture can lead to tension, which can be a barrier to vocal vibrations, limiting your vocal power and weakening your voice. A healthy head, neck and back relationship is key to a healthy voice. From behind, the neck looks straight and from the side the head is in a middle position – not too far forward or too far back with your ears in line with your shoulders.
Consider your teaching environment
What factors might be detrimental to your vocal health? Do you have to shout in a playing field or compete against machinery in a workshop? Think about how you plan your lesson. Could all explanations be done inside or before machinery is used to minimise the need for volume and possible vocal strain?
Awareness of vocal strain
Recognising when something is going wrong is important to prevent it from becoming something more serious. A good rule of thumb is: if it hurts, stop doing it!